蛍光 けいこう Also written 螢光, けい光 Meanings Noun, の-adjective fluorescence Kanji 蛍 firefly. Read as ケイ. 光 light. Read as コウ. Words containing 蛍光 蛍光灯 (けいこうとう) fluorescent lamp 蛍光体 (けいこうたい) fluorescent substance 蛍光色 (けいこうしょく) fluorescent color And 13 more. Jinuma: Japanese Dictionary · Word lists